[Rd] issue with print()ing multibyte characters on R 4.0.4

[Hiroaki Yutani]

I filed an issue for this on R's Bugzilla as well, in case this makes
it easier to track (This is my first time to submit a bug report,
please excuse me if I'm failing to follow the appropriate steps to do
this).

https://bugs.r-project.org/bugzilla/show_bug.cgi?id=18059

2021年2月17日(水) 22:47 Hiroaki Yutani <yutani.ini using gmail.com>:
>
> Thanks for confirming and investigating.
>
> > but it was no one reported in the run up to 4.0.4.
>
> Yes, it was unfortunate that no one had reported it to the right place
> before the release...
>
> 2021年2月17日(水) 19:20 Prof Brian Ripley <ripley using stats.ox.ac.uk>:
>
> >
> > On 17/02/2021 04:58, Hiroaki Yutani wrote:
> > > Hi all,
> > >
> > > I saw several people on Japanese locale claim that, on R 4.0.4,
> > > print() doesn't display
> > > Japanese characters correctly. This seems to happen only on Windows
> > > and on macOS (I
> > > usually use Linux and I don't see this problem).
> > >
> > > For example, in the result below, "鬼" and "外" are displayed in
> > > "\uXXXX" format. What's
> > > curious here is that "は" is displayed as it is, by the way.
> > >
> > >> "鬼は外"
> > > [1] "\u9b3cは\u5916"
> > >
> > > But, if I use such functions as message() or cat(), the string is
> > > displayed as it is.
> > >
> > >> message("鬼は外")
> > > 鬼は外
> >
> > that does not escape non-printable characters, so as expected.
> > >
> > > Considering the fact that it seems only Windows and macOS are
> > > affected, I suspect this
> > > is somehow related to this change described in the release note,
> > > (though I have no idea
> > > what change this is):
> > >
> > >      The internal table for iswprint (used on Windows, macOS and AIX) has been
> > >      updated to include many recent Unicode characters.
> > >      (https://cran.r-project.org/doc/manuals/r-release/NEWS.html)
> > >
> > > Before I'm going to file this issue on Bugzilla, I'd like to confirm
> > > if this is not the intended
> > > change, and, if this is actually intended, I want to discuss how to
> > > improve this behaviour.
> >
> > I am sorry: this was not intended but it was no one reported in the run
> > up to 4.0.4.  It seems to be working in R-devel so I suggest you check
> > that or go back to 4.0.3.
> >
> > It looks like a line in the iswprint table got deleted in the merge from
> > R-devel.  I will try to set up some automated checks to see if I can
> > find any other problems, but that will take a few days.
> >
> > --
> > Brian D. Ripley,                  ripley using stats.ox.ac.uk
> > Emeritus Professor of Applied Statistics, University of Oxford